/* import-globals-from ../../../common/tests/unit/head_helpers.js */

const { ObjectUtils } = ChromeUtils.importESModule(
  "resource://gre/modules/ObjectUtils.sys.mjs"
);

const IS_ANDROID = AppConstants.platform == "android";

const TELEMETRY_COMPONENT = "remotesettings";
const TELEMETRY_EVENTS_FILTERS = {
  category: "uptake.remotecontent.result",
  method: "uptake",
};

let server;
let client;
let clientWithDump;

async function clear_state() {
  // Reset preview mode.
  RemoteSettings.enablePreviewMode(undefined);
  Services.prefs.clearUserPref("services.settings.preview_enabled");

  client.verifySignature = false;
  clientWithDump.verifySignature = false;

  // Clear local DB.
  await client.db.clear();
  // Reset event listeners.
  client._listeners.set("sync", []);

  await clientWithDump.db.clear();

  // Clear events snapshot.
  TelemetryTestUtils.assertEvents([], {}, { process: "dummy" });
}

add_task(() => {
  // Set up an HTTP Server
  server = new HttpServer();
  server.start(-1);

  // Pretend we are in nightly channel to make sure all telemetry events are sent.
  let oldGetChannel = Policy.getChannel;
  Policy.getChannel = () => "nightly";

  // Point the blocklist clients to use this local HTTP server.
  Services.prefs.setStringPref(
    "services.settings.server",
    `http://localhost:${server.identity.primaryPort}/v1`
  );

  Services.prefs.setStringPref("services.settings.loglevel", "debug");

  client = RemoteSettings("password-fields");
  clientWithDump = RemoteSettings("language-dictionaries");

  server.registerPathHandler("/v1/", handleResponse);
  server.registerPathHandler(
    "/v1/buckets/monitor/collections/changes/changeset",
    handleResponse
  );
  server.registerPathHandler(
    "/v1/buckets/main/collections/password-fields/changeset",
    handleResponse
  );
  server.registerPathHandler(
    "/v1/buckets/main/collections/language-dictionaries/changeset",
    handleResponse
  );
  server.registerPathHandler(
    "/v1/buckets/main/collections/with-local-fields/changeset",
    handleResponse
  );
  server.registerPathHandler("/fake-x5u", handleResponse);

  registerCleanupFunction(() => {
    Policy.getChannel = oldGetChannel;
    server.stop(() => {});
  });
});
add_task(clear_state);

add_task(async function test_records_obtained_from_server_are_stored_in_db() {
  // Test an empty db populates
  await client.maybeSync(2000);

  // Open the collection, verify it's been populated:
  // Our test data has a single record; it should be in the local collection
  const list = await client.get();
  equal(list.length, 1);

  const timestamp = await client.db.getLastModified();
  equal(timestamp, 3000, "timestamp was stored");

  const { signature } = await client.db.getMetadata();
  equal(signature.signature, "abcdef", "metadata was stored");
});
add_task(clear_state);

add_task(
  async function test_records_from_dump_are_listed_as_created_in_event() {
    if (IS_ANDROID) {
      // Skip test: we don't ship remote settings dumps on Android (see package-manifest).
      return;
    }
    let received;
    clientWithDump.on("sync", ({ data }) => (received = data));
    // Use a timestamp superior to latest record in dump.
    const timestamp = 5000000000000; // Fri Jun 11 2128

    await clientWithDump.maybeSync(timestamp);

    const list = await clientWithDump.get();
    Assert.greater(
      list.length,
      20,
      `The dump was loaded (${list.length} records)`
    );
    equal(received.created[0].id, "xx", "Record from the sync come first.");

    const createdById = received.created.reduce((acc, r) => {
      acc[r.id] = r;
      return acc;
    }, {});

    ok(
      !(received.deleted[0].id in createdById),
      "Deleted records are not listed as created"
    );
    equal(
      createdById[received.updated[0].new.id],
      received.updated[0].new,
      "The records that were updated should appear as created in their newest form."
    );

    equal(
      received.created.length,
      list.length,
      "The list of created records contains the dump"
    );
    equal(received.current.length, received.created.length);
  }
);
add_task(clear_state);

add_task(async function test_throws_when_network_is_offline() {
  const backupOffline = Services.io.offline;
  try {
    Services.io.offline = true;
    const startSnapshot = getUptakeTelemetrySnapshot(
      TELEMETRY_COMPONENT,
      clientWithDump.identifier
    );
    let error;
    try {
      await clientWithDump.maybeSync(2000);
    } catch (e) {
      error = e;
    }
    equal(error.name, "NetworkOfflineError");

    const endSnapshot = getUptakeTelemetrySnapshot(
      TELEMETRY_COMPONENT,
      clientWithDump.identifier
    );
    const expectedIncrements = {
      [UptakeTelemetry.STATUS.NETWORK_OFFLINE_ERROR]: 1,
    };
    checkUptakeTelemetry(startSnapshot, endSnapshot, expectedIncrements);
  } finally {
    Services.io.offline = backupOffline;
  }
});
add_task(clear_state);

add_task(async function test_sync_event_is_sent_even_if_up_to_date() {
  if (IS_ANDROID) {
    // Skip test: we don't ship remote settings dumps on Android (see package-manifest).
    return;
  }
  // First, determine what is the dump timestamp. Sync will load it.
  // Use a timestamp inferior to latest record in dump.
  await clientWithDump._importJSONDump();
  const uptodateTimestamp = await clientWithDump.db.getLastModified();
  await clear_state();

  // Now, simulate that server data wasn't changed since dump was released.
  const startSnapshot = getUptakeTelemetrySnapshot(
    TELEMETRY_COMPONENT,
    clientWithDump.identifier
  );
  let received;
  clientWithDump.on("sync", ({ data }) => (received = data));

  await clientWithDump.maybeSync(uptodateTimestamp);

  ok(!!received.current.length, "Dump records are listed as created");
  equal(received.current.length, received.created.length);

  const endSnapshot = getUptakeTelemetrySnapshot(
    TELEMETRY_COMPONENT,
    clientWithDump.identifier
  );
  const expectedIncrements = { [UptakeTelemetry.STATUS.UP_TO_DATE]: 1 };
  checkUptakeTelemetry(startSnapshot, endSnapshot, expectedIncrements);
});
add_task(clear_state);

add_task(async function test_records_can_have_local_fields() {
  const c = RemoteSettings("with-local-fields", { localFields: ["accepted"] });
  c.verifySignature = false;

  await c.maybeSync(2000);

  await c.db.update({
    id: "c74279ce-fb0a-42a6-ae11-386b567a6119",
    accepted: true,
  });
  await c.maybeSync(3000); // Does not fail.
});
add_task(clear_state);

add_task(
  async function test_records_changes_are_overwritten_by_server_changes() {
    // Create some local conflicting data, and make sure it syncs without error.
    await client.db.create({
      website: "",
      id: "9d500963-d80e-3a91-6e74-66f3811b99cc",
    });

    await client.maybeSync(2000);

    const data = await client.get();
    equal(data[0].website, "https://some-website.com");
  }
);
add_task(clear_state);

add_task(
  async function test_get_loads_default_records_from_a_local_dump_when_database_is_empty() {
    if (IS_ANDROID) {
      // Skip test: we don't ship remote settings dumps on Android (see package-manifest).
      return;
    }

    // When collection has a dump in services/settings/dumps/{bucket}/{collection}.json
    const data = await clientWithDump.get();
    notEqual(data.length, 0);
    // No synchronization happened (responses are not mocked).
  }
);
add_task(clear_state);

add_task(async function test_get_loads_dump_only_once_if_called_in_parallel() {
  const backup = clientWithDump._importJSONDump;
  let callCount = 0;
  clientWithDump._importJSONDump = async () => {
    callCount++;
    // eslint-disable-next-line mozilla/no-arbitrary-setTimeout
    await new Promise(resolve => setTimeout(resolve, 100));
    return 42;
  };
  await Promise.all([clientWithDump.get(), clientWithDump.get()]);
  equal(callCount, 1, "JSON dump was called more than once");
  clientWithDump._importJSONDump = backup;
});
add_task(clear_state);

add_task(async function test_get_falls_back_to_dump_if_db_fails() {
  if (IS_ANDROID) {
    // Skip test: we don't ship remote settings dumps on Android (see package-manifest).
    return;
  }
  const backup = clientWithDump.db.getLastModified;
  clientWithDump.db.getLastModified = () => {
    throw new Error("Unknown error");
  };

  const records = await clientWithDump.get({ dumpFallback: true });
  ok(!!records.length, "dump content is returned");

  // If fallback is disabled, error is thrown.
  let error;
  try {
    await clientWithDump.get({ dumpFallback: false });
  } catch (e) {
    error = e;
  }
  equal(error.message, "Unknown error");

  clientWithDump.db.getLastModified = backup;
});
add_task(clear_state);

add_task(async function test_get_sorts_results_if_specified() {
  await client.db.importChanges(
    {},
    42,
    [
      {
        field: 12,
        id: "9d500963-d80e-3a91-6e74-66f3811b99cc",
      },
      {
        field: 7,
        id: "d83444a4-f348-4cd8-8228-842cb927db9f",
      },
    ],
    { clear: true }
  );

  const records = await client.get({ order: "field" });
  Assert.less(
    records[0].field,
    records[records.length - 1].field,
    "records are sorted"
  );
});
add_task(clear_state);

add_task(async function test_get_falls_back_sorts_results() {
  if (IS_ANDROID) {
    // Skip test: we don't ship remote settings dumps on Android (see package-manifest).
    return;
  }
  const backup = clientWithDump.db.getLastModified;
  clientWithDump.db.getLastModified = () => {
    throw new Error("Unknown error");
  };

  const records = await clientWithDump.get({
    dumpFallback: true,
    order: "-id",
  });

  // eslint-disable-next-line mozilla/no-comparison-or-assignment-inside-ok
  ok(records[0].id > records[records.length - 1].id, "records are sorted");

  clientWithDump.db.getLastModified = backup;
});
add_task(clear_state);

add_task(async function test_get_falls_back_to_dump_if_db_fails_later() {
  if (IS_ANDROID) {
    // Skip test: we don't ship remote settings dumps on Android (see package-manifest).
    return;
  }
  const backup = clientWithDump.db.list;
  clientWithDump.db.list = () => {
    throw new Error("Unknown error");
  };

  const records = await clientWithDump.get({ dumpFallback: true });
  ok(!!records.length, "dump content is returned");

  // If fallback is disabled, error is thrown.
  let error;
  try {
    await clientWithDump.get({ dumpFallback: false });
  } catch (e) {
    error = e;
  }
  equal(error.message, "Unknown error");

  clientWithDump.db.list = backup;
});
add_task(clear_state);

add_task(async function test_get_falls_back_to_dump_if_network_fails() {
  if (IS_ANDROID) {
    // Skip test: we don't ship remote settings dumps on Android (see package-manifest).
    return;
  }
  const backup = clientWithDump.sync;
  clientWithDump.sync = () => {
    throw new Error("Sync error");
  };

  const records = await clientWithDump.get();
  ok(!!records.length, "dump content is returned");

  clientWithDump.sync = backup;
});
add_task(clear_state);

add_task(async function test_get_does_not_sync_if_empty_dump_is_provided() {
  if (IS_ANDROID) {
    // Skip test: we don't ship remote settings dumps on Android (see package-manifest).
    return;
  }

  const clientWithEmptyDump = RemoteSettings("example");
  Assert.ok(!(await Utils.hasLocalData(clientWithEmptyDump)));

  const data = await clientWithEmptyDump.get();

  equal(data.length, 0);
  Assert.ok(await Utils.hasLocalData(clientWithEmptyDump));
});
add_task(clear_state);

add_task(async function test_get_synchronization_can_be_disabled() {
  const data = await client.get({ syncIfEmpty: false });

  equal(data.length, 0);
});
add_task(clear_state);

add_task(
  async function test_get_triggers_synchronization_when_database_is_empty() {
    // The "password-fields" collection has no local dump, and no local data.
    // Therefore a synchronization will happen.
    const data = await client.get();

    // Data comes from mocked HTTP response (see below).
    equal(data.length, 1);
    equal(data[0].selector, "#webpage[field-pwd]");
  }
);
add_task(clear_state);

add_task(async function test_get_ignores_synchronization_errors_by_default() {
  // The monitor endpoint won't contain any information about this collection.
  let data = await RemoteSettings("some-unknown-key").get();
  equal(data.length, 0);
  // The sync endpoints are not mocked, this fails internally.
  data = await RemoteSettings("no-mocked-responses").get();
  equal(data.length, 0);
});
add_task(clear_state);

add_task(async function test_get_throws_if_no_empty_fallback() {
  // The monitor endpoint won't contain any information about this collection.
  try {
    await RemoteSettings("some-unknown-key").get({
      emptyListFallback: false,
    });
    Assert.ok(false, ".get() should throw");
  } catch (error) {
    Assert.ok(
      error.message.includes("Response from server unparseable"),
      "Server error was thrown"
    );
  }
});
add_task(clear_state);

add_task(async function test_get_verify_signature_no_sync() {
  // No signature in metadata, and no sync if empty.
  let error;
  try {
    await client.get({ verifySignature: true, syncIfEmpty: false });
  } catch (e) {
    error = e;
  }
  equal(error.message, "Missing signature (main/password-fields)");
});
add_task(clear_state);

add_task(async function test_get_can_verify_signature_pulled() {
  // Populate the local DB (only records, eg. loaded from dump previously)
  await client._importJSONDump();

  let calledSignature;
  client._verifier = {
    async asyncVerifyContentSignature(serialized, signature) {
      calledSignature = signature;
      return true;
    },
  };
  client.verifySignature = true;

  // No metadata in local DB, but gets pulled and then verifies.
  ok(ObjectUtils.isEmpty(await client.db.getMetadata()), "Metadata is empty");

  await client.get({ verifySignature: true });

  ok(
    !ObjectUtils.isEmpty(await client.db.getMetadata()),
    "Metadata was pulled"
  );
  ok(calledSignature.endsWith("some-sig"), "Signature was verified");
});
add_task(clear_state);

add_task(async function test_get_can_verify_signature() {
  // Populate the local DB (record and metadata)
  await client.maybeSync(2000);

  // It validates signature that was stored in local DB.
  let calledSignature;
  client._verifier = {
    async asyncVerifyContentSignature(serialized, signature) {
      calledSignature = signature;
      return JSON.parse(serialized).data.length == 1;
    },
  };
  ok(await Utils.hasLocalData(client), "Local data was populated");
  await client.get({ verifySignature: true });

  ok(calledSignature.endsWith("abcdef"), "Signature was verified");

  // It throws when signature does not verify.
  await client.db.delete("9d500963-d80e-3a91-6e74-66f3811b99cc");
  let error = null;
  try {
    await client.get({ verifySignature: true });
  } catch (e) {
    error = e;
  }
  equal(
    error.message,
    "Invalid content signature (main/password-fields) using 'fake-x5u'"
  );
});
add_task(clear_state);

add_task(async function test_get_does_not_verify_signature_if_load_dump() {
  if (IS_ANDROID) {
    // Skip test: we don't ship remote settings dumps on Android (see package-manifest).
    return;
  }

  let called;
  clientWithDump._verifier = {
    async asyncVerifyContentSignature() {
      called = true;
      return true;
    },
  };

  // When dump is loaded, signature is not verified.
  const records = await clientWithDump.get({ verifySignature: true });
  ok(!!records.length, "dump is loaded");
  ok(!called, "signature is missing but not verified");

  // If metadata is missing locally, it is not fetched if `syncIfEmpty` is disabled.
  let error;
  try {
    await clientWithDump.get({ verifySignature: true, syncIfEmpty: false });
  } catch (e) {
    error = e;
  }
  ok(!called, "signer was not called");
  equal(
    error.message,
    "Missing signature (main/language-dictionaries)",
    "signature is missing locally"
  );

  // If metadata is missing locally, it is fetched by default (`syncIfEmpty: true`)
  await clientWithDump.get({ verifySignature: true });
  const metadata = await clientWithDump.db.getMetadata();
  ok(!!Object.keys(metadata).length, "metadata was fetched");
  ok(called, "signature was verified for the data that was in dump");
});
add_task(clear_state);

add_task(
  async function test_get_does_verify_signature_if_json_loaded_in_parallel() {
    const backup = clientWithDump._verifier;
    let callCount = 0;
    clientWithDump._verifier = {
      async asyncVerifyContentSignature() {
        callCount++;
        return true;
      },
    };
    await Promise.all([
      clientWithDump.get({ verifySignature: true }),
      clientWithDump.get({ verifySignature: true }),
    ]);
    equal(callCount, 0, "No need to verify signatures if JSON dump is loaded");
    clientWithDump._verifier = backup;
  }
);
add_task(clear_state);

add_task(async function test_get_can_force_a_sync() {
  const step0 = await client.db.getLastModified();
  await client.get({ forceSync: true });
  const step1 = await client.db.getLastModified();
  await client.get();
  const step2 = await client.db.getLastModified();
  await client.get({ forceSync: true });
  const step3 = await client.db.getLastModified();

  equal(step0, null);
  equal(step1, 3000);
  equal(step2, 3000);
  equal(step3, 3001);
});
add_task(clear_state);

add_task(async function test_sync_runs_once_only() {
  const backup = Utils.log.warn;
  const messages = [];
  Utils.log.warn = m => {
    messages.push(m);
  };

  await Promise.all([client.maybeSync(2000), client.maybeSync(2000)]);

  ok(
    messages.includes("main/password-fields sync already running"),
    "warning is shown about sync already running"
  );
  Utils.log.warn = backup;
});
add_task(clear_state);

add_task(
  async function test_sync_pulls_metadata_if_missing_with_dump_is_up_to_date() {
    if (IS_ANDROID) {
      // Skip test: we don't ship remote settings dumps on Android (see package-manifest).
      return;
    }

    let called;
    clientWithDump._verifier = {
      async asyncVerifyContentSignature() {
        called = true;
        return true;
      },
    };
    // When dump is loaded, signature is not verified.
    const records = await clientWithDump.get({ verifySignature: true });
    ok(!!records.length, "dump is loaded");
    ok(!called, "signature is missing but not verified");

    // Synchronize the collection (local data is up-to-date).
    // Signature verification is disabled (see `clear_state()`), so we don't bother with
    // fetching metadata.
    const uptodateTimestamp = await clientWithDump.db.getLastModified();
    await clientWithDump.maybeSync(uptodateTimestamp);
    let metadata = await clientWithDump.db.getMetadata();
    ok(!metadata, "metadata was not fetched");

    // Synchronize again the collection (up-to-date, since collection last modified still > 42)
    clientWithDump.verifySignature = true;
    await clientWithDump.maybeSync(42);

    // With signature verification, metadata was fetched.
    metadata = await clientWithDump.db.getMetadata();
    ok(!!Object.keys(metadata).length, "metadata was fetched");
    ok(called, "signature was verified for the data that was in dump");

    // Metadata is present, signature will now verified.
    called = false;
    await clientWithDump.get({ verifySignature: true });
    ok(called, "local signature is verified");
  }
);
add_task(clear_state);

add_task(async function test_sync_event_provides_information_about_records() {
  let eventData;
  client.on("sync", ({ data }) => (eventData = data));

  await client.maybeSync(2000);
  equal(eventData.current.length, 1);

  await client.maybeSync(3001);
  equal(eventData.current.length, 2);
  equal(eventData.created.length, 1);
  equal(eventData.created[0].website, "https://www.other.org/signin");
  equal(eventData.updated.length, 1);
  equal(eventData.updated[0].old.website, "https://some-website.com");
  equal(eventData.updated[0].new.website, "https://some-website.com/login");
  equal(eventData.deleted.length, 0);

  await client.maybeSync(4001);
  equal(eventData.current.length, 1);
  equal(eventData.created.length, 0);
  equal(eventData.updated.length, 0);
  equal(eventData.deleted.length, 1);
  equal(eventData.deleted[0].website, "https://www.other.org/signin");
});
add_task(clear_state);

add_task(async function test_inspect_method() {
  // Synchronize the `password-fields` collection in order to have
  // some local data when .inspect() is called.
  await client.maybeSync(2000);

  const inspected = await RemoteSettings.inspect();

  // Assertion for global attributes.
  const { mainBucket, serverURL, defaultSigner, collections, serverTimestamp } =
    inspected;
  const rsSigner = "remote-settings.content-signature.mozilla.org";
  equal(mainBucket, "main");
  equal(serverURL, `http://localhost:${server.identity.primaryPort}/v1`);
  equal(defaultSigner, rsSigner);
  equal(serverTimestamp, '"5000"');

  // A collection is listed in .inspect() if it has local data or if there
  // is a JSON dump for it.
  // "password-fields" has no dump but was synchronized above and thus has local data.
  let col = collections.pop();
  equal(col.collection, "password-fields");
  equal(col.serverTimestamp, 3000);
  equal(col.localTimestamp, 3000);

  if (!IS_ANDROID) {
    // "language-dictionaries" has a local dump (not on Android)
    col = collections.pop();
    equal(col.collection, "language-dictionaries");
    equal(col.serverTimestamp, 4000);
    ok(!col.localTimestamp); // not synchronized.
  }
});
add_task(clear_state);

add_task(async function test_inspect_method_uses_a_random_cache_bust() {
  const backup = Utils.fetchLatestChanges;
  const cacheBusts = [];
  Utils.fetchLatestChanges = (url, options) => {
    cacheBusts.push(options.expected);
    return { changes: [] };
  };

  await RemoteSettings.inspect();
  await RemoteSettings.inspect();
  await RemoteSettings.inspect();

  notEqual(cacheBusts[0], cacheBusts[1]);
  notEqual(cacheBusts[1], cacheBusts[2]);
  notEqual(cacheBusts[0], cacheBusts[2]);
  Utils.fetchLatestChanges = backup;
});

add_task(async function test_clearAll_method() {
  // Make sure we have some local data.
  await client.maybeSync(2000);
  await clientWithDump.maybeSync(2000);

  await RemoteSettings.clearAll();

  ok(!(await Utils.hasLocalData(client)), "Local data was deleted");
  ok(!(await Utils.hasLocalData(clientWithDump)), "Local data was deleted");
  ok(
    !Services.prefs.prefHasUserValue(client.lastCheckTimePref),
    "Pref was cleaned"
  );

  // Synchronization is not broken after resuming.
  await client.maybeSync(2000);
  await clientWithDump.maybeSync(2000);
  ok(await Utils.hasLocalData(client), "Local data was populated");
  ok(await Utils.hasLocalData(clientWithDump), "Local data was populated");
});
add_task(clear_state);

add_task(async function test_listeners_are_not_deduplicated() {
  let count = 0;
  const plus1 = () => {
    count += 1;
  };

  client.on("sync", plus1);
  client.on("sync", plus1);
  client.on("sync", plus1);

  await client.maybeSync(2000);

  equal(count, 3);
});
add_task(clear_state);

add_task(async function test_listeners_can_be_removed() {
  let count = 0;
  const onSync = () => {
    count += 1;
  };

  client.on("sync", onSync);
  client.off("sync", onSync);

  await client.maybeSync(2000);

  equal(count, 0);
});
add_task(clear_state);

add_task(async function test_all_listeners_are_executed_if_one_fails() {
  let count = 0;
  client.on("sync", () => {
    count += 1;
  });
  client.on("sync", () => {
    throw new Error("boom");
  });
  client.on("sync", () => {
    count += 2;
  });

  let error;
  try {
    await client.maybeSync(2000);
  } catch (e) {
    error = e;
  }

  equal(count, 3);
  equal(error.message, "boom");
});
add_task(clear_state);

add_task(async function test_telemetry_reports_up_to_date() {
  await client.maybeSync(2000);
  const startSnapshot = getUptakeTelemetrySnapshot(
    TELEMETRY_COMPONENT,
    client.identifier
  );

  await client.maybeSync(3000);

  // No Telemetry was sent.
  const endSnapshot = getUptakeTelemetrySnapshot(
    TELEMETRY_COMPONENT,
    client.identifier
  );
  const expectedIncrements = { [UptakeTelemetry.STATUS.UP_TO_DATE]: 1 };
  checkUptakeTelemetry(startSnapshot, endSnapshot, expectedIncrements);
});
add_task(clear_state);

add_task(async function test_telemetry_if_sync_succeeds() {
  // We test each client because Telemetry requires preleminary declarations.
  const startSnapshot = getUptakeTelemetrySnapshot(
    TELEMETRY_COMPONENT,
    client.identifier
  );

  await client.maybeSync(2000);

  const endSnapshot = getUptakeTelemetrySnapshot(
    TELEMETRY_COMPONENT,
    client.identifier
  );
  const expectedIncrements = { [UptakeTelemetry.STATUS.SUCCESS]: 1 };
  checkUptakeTelemetry(startSnapshot, endSnapshot, expectedIncrements);
});
add_task(clear_state);

add_task(
  async function test_synchronization_duration_is_reported_in_uptake_status() {
    await client.maybeSync(2000);

    TelemetryTestUtils.assertEvents(
      [
        [
          "uptake.remotecontent.result",
          "uptake",
          "remotesettings",
          UptakeTelemetry.STATUS.SUCCESS,
          {
            source: client.identifier,
            duration: v => v > 0,
            trigger: "manual",
          },
        ],
      ],
      TELEMETRY_EVENTS_FILTERS
    );
  }
);
add_task(clear_state);

add_task(async function test_telemetry_reports_if_application_fails() {
  const startSnapshot = getUptakeTelemetrySnapshot(
    TELEMETRY_COMPONENT,
    client.identifier
  );
  client.on("sync", () => {
    throw new Error("boom");
  });

  try {
    await client.maybeSync(2000);
  } catch (e) {}

  const endSnapshot = getUptakeTelemetrySnapshot(
    TELEMETRY_COMPONENT,
    client.identifier
  );
  const expectedIncrements = { [UptakeTelemetry.STATUS.APPLY_ERROR]: 1 };
  checkUptakeTelemetry(startSnapshot, endSnapshot, expectedIncrements);
});
add_task(clear_state);

add_task(async function test_telemetry_reports_if_sync_fails() {
  await client.db.importChanges({}, 9999);

  const startSnapshot = getUptakeTelemetrySnapshot(
    TELEMETRY_COMPONENT,
    client.identifier
  );

  try {
    await client.maybeSync(10000);
  } catch (e) {}

  const endSnapshot = getUptakeTelemetrySnapshot(
    TELEMETRY_COMPONENT,
    client.identifier
  );
  const expectedIncrements = { [UptakeTelemetry.STATUS.SERVER_ERROR]: 1 };
  checkUptakeTelemetry(startSnapshot, endSnapshot, expectedIncrements);
});
add_task(clear_state);

add_task(async function test_telemetry_reports_if_parsing_fails() {
  await client.db.importChanges({}, 10000);

  const startSnapshot = getUptakeTelemetrySnapshot(
    TELEMETRY_COMPONENT,
    client.identifier
  );

  try {
    await client.maybeSync(10001);
  } catch (e) {}

  const endSnapshot = getUptakeTelemetrySnapshot(
    TELEMETRY_COMPONENT,
    client.identifier
  );
  const expectedIncrements = { [UptakeTelemetry.STATUS.PARSE_ERROR]: 1 };
  checkUptakeTelemetry(startSnapshot, endSnapshot, expectedIncrements);
});
add_task(clear_state);

add_task(async function test_telemetry_reports_if_fetching_signature_fails() {
  await client.db.importChanges({}, 11000);

  const startSnapshot = getUptakeTelemetrySnapshot(
    TELEMETRY_COMPONENT,
    client.identifier
  );

  try {
    await client.maybeSync(11001);
  } catch (e) {}

  const endSnapshot = getUptakeTelemetrySnapshot(
    TELEMETRY_COMPONENT,
    client.identifier
  );
  const expectedIncrements = { [UptakeTelemetry.STATUS.SERVER_ERROR]: 1 };
  checkUptakeTelemetry(startSnapshot, endSnapshot, expectedIncrements);
});
add_task(clear_state);

add_task(async function test_telemetry_reports_unknown_errors() {
  const backup = client.db.list;
  client.db.list = () => {
    throw new Error("Internal");
  };
  const startSnapshot = getUptakeTelemetrySnapshot(
    TELEMETRY_COMPONENT,
    client.identifier
  );

  try {
    await client.maybeSync(2000);
  } catch (e) {}

  client.db.list = backup;
  const endSnapshot = getUptakeTelemetrySnapshot(
    TELEMETRY_COMPONENT,
    client.identifier
  );
  const expectedIncrements = { [UptakeTelemetry.STATUS.UNKNOWN_ERROR]: 1 };
  checkUptakeTelemetry(startSnapshot, endSnapshot, expectedIncrements);
});
add_task(clear_state);

add_task(async function test_telemetry_reports_indexeddb_as_custom_1() {
  const backup = client.db.getLastModified;
  const msg =
    "IndexedDB getLastModified() The operation failed for reasons unrelated to the database itself";
  client.db.getLastModified = () => {
    throw new Error(msg);
  };
  const startSnapshot = getUptakeTelemetrySnapshot(
    TELEMETRY_COMPONENT,
    client.identifier
  );

  try {
    await client.maybeSync(2000);
  } catch (e) {}

  client.db.getLastModified = backup;
  const endSnapshot = getUptakeTelemetrySnapshot(
    TELEMETRY_COMPONENT,
    client.identifier
  );
  const expectedIncrements = { [UptakeTelemetry.STATUS.CUSTOM_1_ERROR]: 1 };
  checkUptakeTelemetry(startSnapshot, endSnapshot, expectedIncrements);
});
add_task(clear_state);

add_task(async function test_telemetry_reports_error_name_as_event_nightly() {
  const backup = client.db.list;
  client.db.list = () => {
    const e = new Error("Some unknown error");
    e.name = "ThrownError";
    throw e;
  };

  try {
    await client.maybeSync(2000);
  } catch (e) {}

  TelemetryTestUtils.assertEvents(
    [
      [
        "uptake.remotecontent.result",
        "uptake",
        "remotesettings",
        UptakeTelemetry.STATUS.UNKNOWN_ERROR,
        {
          source: client.identifier,
          trigger: "manual",
          duration: v => v >= 0,
          errorName: "ThrownError",
        },
      ],
    ],
    TELEMETRY_EVENTS_FILTERS
  );

  client.db.list = backup;
});
add_task(clear_state);

add_task(async function test_bucketname_changes_when_preview_mode_is_enabled() {
  equal(client.bucketName, "main");

  RemoteSettings.enablePreviewMode(true);

  equal(client.bucketName, "main-preview");
});
add_task(clear_state);

add_task(
  async function test_preview_mode_pref_affects_bucket_names_before_instantiated() {
    Services.prefs.setBoolPref("services.settings.preview_enabled", true);

    let clientWithDefaultBucket = RemoteSettings("other");
    let clientWithBucket = RemoteSettings("coll", { bucketName: "buck" });

    equal(clientWithDefaultBucket.bucketName, "main-preview");
    equal(clientWithBucket.bucketName, "buck-preview");
  }
);
add_task(clear_state);

add_task(
  async function test_preview_enabled_pref_ignored_when_mode_is_set_explicitly() {
    Services.prefs.setBoolPref("services.settings.preview_enabled", true);

    let clientWithDefaultBucket = RemoteSettings("other");
    let clientWithBucket = RemoteSettings("coll", { bucketName: "buck" });

    equal(clientWithDefaultBucket.bucketName, "main-preview");
    equal(clientWithBucket.bucketName, "buck-preview");

    RemoteSettings.enablePreviewMode(false);

    equal(clientWithDefaultBucket.bucketName, "main");
    equal(clientWithBucket.bucketName, "buck");
  }
);
add_task(clear_state);

add_task(
  async function test_get_loads_default_records_from_a_local_dump_when_preview_mode_is_enabled() {
    if (IS_ANDROID) {
      // Skip test: we don't ship remote settings dumps on Android (see package-manifest).
      return;
    }
    RemoteSettings.enablePreviewMode(true);
    // When collection has a dump in services/settings/dumps/{bucket}/{collection}.json
    const data = await clientWithDump.get();
    notEqual(data.length, 0);
    // No synchronization happened (responses are not mocked).
  }
);
add_task(clear_state);

add_task(async function test_local_db_distinguishes_preview_records() {
  RemoteSettings.enablePreviewMode(true);
  client.db.importChanges({}, Date.now(), [{ id: "record-1" }], {
    clear: true,
  });

  RemoteSettings.enablePreviewMode(false);
  client.db.importChanges({}, Date.now(), [{ id: "record-2" }], {
    clear: true,
  });

  deepEqual(await client.get(), [{ id: "record-2" }]);
});
add_task(clear_state);

add_task(
  async function test_inspect_changes_the_list_when_preview_mode_is_enabled() {
    if (IS_ANDROID) {
      // Skip test: we don't ship remote settings dumps on Android (see package-manifest),
      // and this test relies on the fact that clients are instantiated if a dump is packaged.
      return;
    }

    // Register a client only listed in -preview...
    RemoteSettings("crash-rate");

    const { collections: before, previewMode: previewModeBefore } =
      await RemoteSettings.inspect();

    Assert.ok(!previewModeBefore, "preview is not enabled");

    // These two collections are listed in the main bucket in monitor/changes (one with dump, one registered).
    deepEqual(before.map(c => c.collection).sort(), [
      "language-dictionaries",
      "password-fields",
    ]);

    // Switch to preview mode.
    RemoteSettings.enablePreviewMode(true);

    const {
      collections: after,
      mainBucket,
      previewMode,
    } = await RemoteSettings.inspect();

    Assert.ok(previewMode, "preview is enabled");

    // These two collections are listed in the main bucket in monitor/changes (both are registered).
    deepEqual(after.map(c => c.collection).sort(), [
      "crash-rate",
      "password-fields",
    ]);
    equal(mainBucket, "main-preview");
  }
);
add_task(clear_state);

add_task(async function test_sync_event_is_not_sent_from_get_when_no_dump() {
  let called = false;
  client.on("sync", () => {
    called = true;
  });

  await client.get();

  Assert.ok(!called, "sync event is not sent from .get()");
});
add_task(clear_state);

add_task(async function test_get_can_be_called_from_sync_event_callback() {
  let fromGet;
  let fromEvent;

  client.on("sync", async ({ data: { current } }) => {
    // Before fixing Bug 1761953 this would result in a deadlock.
    fromGet = await client.get();
    fromEvent = current;
  });

  await client.maybeSync(2000);

  Assert.ok(fromGet, "sync callback was called");
  Assert.deepEqual(fromGet, fromEvent, ".get() gives current records list");
});
add_task(clear_state);

add_task(async function test_attachments_are_pruned_when_sync_from_timer() {
  await client.db.saveAttachment("bar", {
    record: { id: "bar" },
    blob: new Blob(["456"]),
  });

  await client.maybeSync(2000, { trigger: "broadcast" });

  Assert.ok(
    await client.attachments.cacheImpl.get("bar"),
    "Extra attachment was not deleted on broadcast"
  );

  await client.maybeSync(3001, { trigger: "timer" });

  Assert.ok(
    !(await client.attachments.cacheImpl.get("bar")),
    "Extra attachment was deleted on timer"
  );
});
add_task(clear_state);

function handleResponse(request, response) {
  try {
    const sample = getSampleResponse(request, server.identity.primaryPort);
    if (!sample) {
      do_throw(
        `unexpected ${request.method} request for ${request.path}?${request.queryString}`
      );
    }

    response.setStatusLine(
      null,
      sample.status.status,
      sample.status.statusText
    );
    // send the headers
    for (let headerLine of sample.sampleHeaders) {
      let headerElements = headerLine.split(":");
      response.setHeader(headerElements[0], headerElements[1].trimLeft());
    }
    response.setHeader("Date", new Date().toUTCString());

    const body =
      typeof sample.responseBody == "string"
        ? sample.responseBody
        : JSON.stringify(sample.responseBody);
    response.write(body);
    response.finish();
  } catch (e) {
    info(e);
  }
}

function getSampleResponse(req, port) {
  const responses = {
    OPTIONS: {
      sampleHeaders: [
        "Access-Control-Allow-Headers: Content-Length,Expires,Backoff,Retry-After,Last-Modified,Total-Records,ETag,Pragma,Cache-Control,authorization,content-type,if-none-match,Alert,Next-Page",
        "Access-Control-Allow-Methods: GET,HEAD,OPTIONS,POST,DELETE,OPTIONS",
        "Access-Control-Allow-Origin: *",
        "Content-Type: application/json; charset=UTF-8",
        "Server: waitress",
      ],
      status: { status: 200, statusText: "OK" },
      responseBody: null,
    },
    "GET:/v1/": {
      sampleHeaders: [
        "Access-Control-Allow-Origin: *",
        "Access-Control-Expose-Headers: Retry-After, Content-Length, Alert, Backoff",
        "Content-Type: application/json; charset=UTF-8",
        "Server: waitress",
      ],
      status: { status: 200, statusText: "OK" },
      responseBody: {
        settings: {
          batch_max_requests: 25,
        },
        url: `http://localhost:${port}/v1/`,
        documentation: "https://kinto.readthedocs.org/",
        version: "1.5.1",
        commit: "cbc6f58",
        hello: "kinto",
      },
    },
    "GET:/v1/buckets/monitor/collections/changes/changeset": {
      sampleHeaders: [
        "Access-Control-Allow-Origin: *",
        "Access-Control-Expose-Headers: Retry-After, Content-Length, Alert, Backoff",
        "Content-Type: application/json; charset=UTF-8",
        "Server: waitress",
        `Date: ${new Date().toUTCString()}`,
        'Etag: "5000"',
      ],
      status: { status: 200, statusText: "OK" },
      responseBody: {
        timestamp: 5000,
        changes: [
          {
            id: "4676f0c7-9757-4796-a0e8-b40a5a37a9c9",
            bucket: "main",
            collection: "unknown-locally",
            last_modified: 5000,
          },
          {
            id: "4676f0c7-9757-4796-a0e8-b40a5a37a9c9",
            bucket: "main",
            collection: "language-dictionaries",
            last_modified: 4000,
          },
          {
            id: "0af8da0b-3e03-48fb-8d0d-2d8e4cb7514d",
            bucket: "main",
            collection: "password-fields",
            last_modified: 3000,
          },
          {
            id: "4acda969-3bd3-4074-a678-ff311eeb076e",
            bucket: "main-preview",
            collection: "password-fields",
            last_modified: 2000,
          },
          {
            id: "58697bd1-315f-4185-9bee-3371befc2585",
            bucket: "main-preview",
            collection: "crash-rate",
            last_modified: 1000,
          },
        ],
      },
    },
    "GET:/fake-x5u": {
      sampleHeaders: ["Content-Type: application/octet-stream"],
      status: { status: 200, statusText: "OK" },
      responseBody: `-----BEGIN CERTIFICATE-----
MIIGYTCCBEmgAwIBAgIBATANBgkqhkiG9w0BAQwFADB9MQswCQYDVQQGEwJVU
ZARKjbu1TuYQHf0fs+GwID8zeLc2zJL7UzcHFwwQ6Nda9OJN4uPAuC/BKaIpxCLL
26b24/tRam4SJjqpiq20lynhUrmTtt6hbG3E1Hpy3bmkt2DYnuMFwEx2gfXNcnbT
wNuvFqc=
-----END CERTIFICATE-----`,
    },
    "GET:/v1/buckets/main/collections/password-fields/changeset?_expected=2000":
      {
        sampleHeaders: [
          "Access-Control-Allow-Origin: *",
          "Access-Control-Expose-Headers: Retry-After, Content-Length, Alert, Backoff",
          "Content-Type: application/json; charset=UTF-8",
          "Server: waitress",
          'Etag: "3000"',
        ],
        status: { status: 200, statusText: "OK" },
        responseBody: {
          timestamp: 3000,
          metadata: {
            id: "password-fields",
            last_modified: 1234,
            signature: {
              signature: "abcdef",
              x5u: `http://localhost:${port}/fake-x5u`,
            },
          },
          changes: [
            {
              id: "9d500963-d80e-3a91-6e74-66f3811b99cc",
              last_modified: 3000,
              website: "https://some-website.com",
              selector: "#user[password]",
            },
          ],
        },
      },
    "GET:/v1/buckets/main/collections/password-fields/changeset?_expected=3001&_since=%223000%22":
      {
        sampleHeaders: [
          "Access-Control-Allow-Origin: *",
          "Access-Control-Expose-Headers: Retry-After, Content-Length, Alert, Backoff",
          "Content-Type: application/json; charset=UTF-8",
          "Server: waitress",
          'Etag: "4000"',
        ],
        status: { status: 200, statusText: "OK" },
        responseBody: {
          metadata: {
            signature: {},
          },
          timestamp: 4000,
          changes: [
            {
              id: "aabad965-e556-ffe7-4191-074f5dee3df3",
              last_modified: 4000,
              website: "https://www.other.org/signin",
              selector: "#signinpassword",
            },
            {
              id: "9d500963-d80e-3a91-6e74-66f3811b99cc",
              last_modified: 3500,
              website: "https://some-website.com/login",
              selector: "input#user[password]",
            },
          ],
        },
      },
    "GET:/v1/buckets/main/collections/password-fields/changeset?_expected=4001&_since=%224000%22":
      {
        sampleHeaders: [
          "Access-Control-Allow-Origin: *",
          "Access-Control-Expose-Headers: Retry-After, Content-Length, Alert, Backoff",
          "Content-Type: application/json; charset=UTF-8",
          "Server: waitress",
          'Etag: "5000"',
        ],
        status: { status: 200, statusText: "OK" },
        responseBody: {
          metadata: {
            signature: {},
          },
          timestamp: 5000,
          changes: [
            {
              id: "aabad965-e556-ffe7-4191-074f5dee3df3",
              deleted: true,
            },
          ],
        },
      },
    "GET:/v1/buckets/main/collections/password-fields/changeset?_expected=10000&_since=%229999%22":
      {
        sampleHeaders: [
          "Access-Control-Allow-Origin: *",
          "Access-Control-Expose-Headers: Retry-After, Content-Length, Alert, Backoff",
          "Content-Type: application/json; charset=UTF-8",
          "Server: waitress",
        ],
        status: { status: 503, statusText: "Service Unavailable" },
        responseBody: {
          code: 503,
          errno: 999,
          error: "Service Unavailable",
        },
      },
    "GET:/v1/buckets/main/collections/password-fields/changeset?_expected=10001&_since=%2210000%22":
      {
        sampleHeaders: [
          "Access-Control-Allow-Origin: *",
          "Access-Control-Expose-Headers: Retry-After, Content-Length, Alert, Backoff",
          "Content-Type: application/json; charset=UTF-8",
          "Server: waitress",
          'Etag: "10001"',
        ],
        status: { status: 200, statusText: "OK" },
        responseBody: "<invalid json",
      },
    "GET:/v1/buckets/main/collections/password-fields/changeset?_expected=11001&_since=%2211000%22":
      {
        sampleHeaders: [
          "Access-Control-Allow-Origin: *",
          "Access-Control-Expose-Headers: Retry-After, Content-Length, Alert, Backoff",
          "Content-Type: application/json; charset=UTF-8",
          "Server: waitress",
        ],
        status: { status: 503, statusText: "Service Unavailable" },
        responseBody: {
          changes: [
            {
              id: "c4f021e3-f68c-4269-ad2a-d4ba87762b35",
              last_modified: 4000,
              website: "https://www.eff.org",
              selector: "#pwd",
            },
          ],
        },
      },
    "GET:/v1/buckets/main/collections/password-fields?_expected=11001": {
      sampleHeaders: [
        "Access-Control-Allow-Origin: *",
        "Access-Control-Expose-Headers: Retry-After, Content-Length, Alert, Backoff",
        "Content-Type: application/json; charset=UTF-8",
        "Server: waitress",
      ],
      status: { status: 503, statusText: "Service Unavailable" },
      responseBody: {
        code: 503,
        errno: 999,
        error: "Service Unavailable",
      },
    },
    "GET:/v1/buckets/monitor/collections/changes/changeset?collection=password-fields&bucket=main&_expected=0":
      {
        sampleHeaders: [
          "Access-Control-Allow-Origin: *",
          "Access-Control-Expose-Headers: Retry-After, Content-Length, Alert, Backoff",
          "Content-Type: application/json; charset=UTF-8",
          "Server: waitress",
          `Date: ${new Date().toUTCString()}`,
          'Etag: "1338"',
        ],
        status: { status: 200, statusText: "OK" },
        responseBody: {
          timestamp: 1338,
          changes: [
            {
              id: "fe5758d0-c67a-42d0-bb4f-8f2d75106b65",
              bucket: "main",
              collection: "password-fields",
              last_modified: 1337,
            },
          ],
        },
      },
    "GET:/v1/buckets/main/collections/password-fields/changeset?_expected=1337":
      {
        sampleHeaders: [
          "Access-Control-Allow-Origin: *",
          "Access-Control-Expose-Headers: Retry-After, Content-Length, Alert, Backoff",
          "Content-Type: application/json; charset=UTF-8",
          "Server: waitress",
          'Etag: "3000"',
        ],
        status: { status: 200, statusText: "OK" },
        responseBody: {
          metadata: {
            signature: {
              signature: "some-sig",
              x5u: `http://localhost:${port}/fake-x5u`,
            },
          },
          timestamp: 3000,
          changes: [
            {
              id: "312cc78d-9c1f-4291-a4fa-a1be56f6cc69",
              last_modified: 3000,
              website: "https://some-website.com",
              selector: "#webpage[field-pwd]",
            },
          ],
        },
      },
    "GET:/v1/buckets/main/collections/password-fields/changeset?_expected=1337&_since=%223000%22":
      {
        sampleHeaders: [
          "Access-Control-Allow-Origin: *",
          "Access-Control-Expose-Headers: Retry-After, Content-Length, Alert, Backoff",
          "Content-Type: application/json; charset=UTF-8",
          "Server: waitress",
          'Etag: "3001"',
        ],
        status: { status: 200, statusText: "OK" },
        responseBody: {
          metadata: {
            signature: {
              signature: "some-sig",
              x5u: `http://localhost:${port}/fake-x5u`,
            },
          },
          timestamp: 3001,
          changes: [
            {
              id: "312cc78d-9c1f-4291-a4fa-a1be56f6cc69",
              last_modified: 3001,
              website: "https://some-website-2.com",
              selector: "#webpage[field-pwd]",
            },
          ],
        },
      },
    "GET:/v1/buckets/main/collections/language-dictionaries/changeset": {
      sampleHeaders: [
        "Access-Control-Allow-Origin: *",
        "Access-Control-Expose-Headers: Retry-After, Content-Length, Alert, Backoff",
        "Content-Type: application/json; charset=UTF-8",
        "Server: waitress",
        'Etag: "5000000000000"',
      ],
      status: { status: 200, statusText: "OK" },
      responseBody: {
        timestamp: 5000000000000,
        metadata: {
          id: "language-dictionaries",
          last_modified: 1234,
          signature: {
            signature: "xyz",
            x5u: `http://localhost:${port}/fake-x5u`,
          },
        },
        changes: [
          {
            id: "xx",
            last_modified: 5000000000000,
            dictionaries: ["xx-XX@dictionaries.addons.mozilla.org"],
          },
          {
            id: "fr",
            last_modified: 5000000000000 - 1,
            deleted: true,
          },
          {
            id: "pt-BR",
            last_modified: 5000000000000 - 2,
            dictionaries: ["pt-BR@for-tests"],
          },
        ],
      },
    },
    "GET:/v1/buckets/main/collections/with-local-fields/changeset?_expected=2000":
      {
        sampleHeaders: [
          "Access-Control-Allow-Origin: *",
          "Access-Control-Expose-Headers: Retry-After, Content-Length, Alert, Backoff",
          "Content-Type: application/json; charset=UTF-8",
          "Server: waitress",
          'Etag: "2000"',
        ],
        status: { status: 200, statusText: "OK" },
        responseBody: {
          timestamp: 2000,
          metadata: {
            id: "with-local-fields",
            last_modified: 1234,
            signature: {
              signature: "xyz",
              x5u: `http://localhost:${port}/fake-x5u`,
            },
          },
          changes: [
            {
              id: "c74279ce-fb0a-42a6-ae11-386b567a6119",
              last_modified: 2000,
            },
          ],
        },
      },
    "GET:/v1/buckets/main/collections/with-local-fields/changeset?_expected=3000&_since=%222000%22":
      {
        sampleHeaders: [
          "Access-Control-Allow-Origin: *",
          "Access-Control-Expose-Headers: Retry-After, Content-Length, Alert, Backoff",
          "Content-Type: application/json; charset=UTF-8",
          "Server: waitress",
          'Etag: "3000"',
        ],
        status: { status: 200, statusText: "OK" },
        responseBody: {
          timestamp: 3000,
          metadata: {
            signature: {},
          },
          changes: [
            {
              id: "1f5c98b9-6d93-4c13-aa26-978b38695096",
              last_modified: 3000,
            },
          ],
        },
      },
    "GET:/v1/buckets/monitor/collections/changes/changeset?collection=no-mocked-responses&bucket=main&_expected=0":
      {
        sampleHeaders: [
          "Access-Control-Allow-Origin: *",
          "Access-Control-Expose-Headers: Retry-After, Content-Length, Alert, Backoff",
          "Content-Type: application/json; charset=UTF-8",
          "Server: waitress",
          `Date: ${new Date().toUTCString()}`,
          'Etag: "713705"',
        ],
        status: { status: 200, statusText: "OK" },
        responseBody: {
          data: [
            {
              id: "07a98d1b-7c62-4344-ab18-76856b3facd8",
              bucket: "main",
              collection: "no-mocked-responses",
              last_modified: 713705,
            },
          ],
        },
      },
  };
  return (
    responses[`${req.method}:${req.path}?${req.queryString}`] ||
    responses[`${req.method}:${req.path}`] ||
    responses[req.method]
  );
}